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S3400-48T4SP

FS S3400-48T4SP User guide

  • Hello! I've reviewed the ERPS Configuration Guide for the FS S3400-48T4SP Switch. This document provides a detailed overview of the Fast Ethernet Ring Protection protocol, including its mechanisms for preventing data loops, managing link failures and supporting different network topologies. The guide explains how to configure various node roles, use R-APS virtual channels, and set up protection switching. It also provides step-by-step configuration examples. I'm ready to help you understand the document and answer any questions you have about the ERPS configuration on your device.
  • What is the purpose of the ERPS protocol?
    What are the different roles of network nodes in ERPS?
    What is the role of R-APS virtual channels?
    What are the effects of return and non-return modes?
Model: S3400-48T4SP
S3400-48T4SP Switch
ERPS Configuration Guide
Contents
1. Introduction to Fast Ethernet Ring Protection.............................................................................................................1
1.1 Overview..................................................................................................................................................................................................... 1
1.2 ERPS Related Concepts.............................................................................................................................................................................. 1
1.2.1 Ring Network Level............................................................................................................................................................................ 1
1.2.2 Network Node Role............................................................................................................................................................................1
1.2.3 Ring Network Port Role......................................................................................................................................................................2
1.2.4 ERPS and CFM.................................................................................................................................................................................... 2
1.2.5 Connectivity Mode Using R-APS Virtual Channels............................................................................................................................ 3
1.2.6 R-APS Transmission VLAN.................................................................................................................................................................. 3
1.2.7 Return Mode...................................................................................................................................................................................... 3
1.3 ERPS Message Type......................................................................................................................................................................................
3
1.4 ERPS Ring Network Protection Mechanism............................................................................................................................................. 4
1.4.1 Stable State........................................................................................................................................................................................ 4
1.4.2 Local Link Failure Processing............................................................................................................................................................. 4
1.4.3 Local Link Recovery Processing......................................................................................................................................................... 4
1.4.4 Protection of Switching —— Link Recovery..................................................................................................................................... 4
1.4.5 Protection Switching —— Manual Switching...................................................................................................................................4
1.4.6 Protection Switching —— Forced Switching....................................................................................................................................5
1.4.7 Replacement Recovery Process......................................................................................................................................................... 5
2. ERPS Configuration.......................................................................................................................................................... 6
2.1 ERPS Configuration Notes...........................................................................................................................................................................6
2.2 ERPS Configuration Tasks............................................................................................................................................................................6
2.2.1 Configuration of Ring Network Nodes.............................................................................................................................................. 6
2.2.2 Configure Loop Ports......................................................................................................................................................................... 7
2.2.3 Ring Network Control Command...................................................................................................................................................... 8
2.2.4 View Ring Protection Protocol Status................................................................................................................................................ 8
2.3 ERPS Configuration Examples................................................................................................................................................................... 8
2.3.1 Configuration Example 1- ERPS Single Ring Configuration.............................................................................................................. 8
2.3.2 Configuration Example 2- ERPS Multi-ring Configuration................................................................................................................ 12
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Chapter 1 Introduction to Fast Ethernet Ring Protection
1.1 Overview
The fast Ethernet protection protocol is a kind of special link layer protocol, which is used to construct the ring-like
Ethernet topology. Ethernet protection protocol blocks a link in the case of complete topology of the ring network to
prevent the occurrence of data loops to form a broadcast storm. In the case of link interruption, the protocol quickly
recovers the previously blocked link, so that the communication between the nodes of the ring network is restored.
Fast loop protection protocol ensures that data packets can be sent to the correct link when topology changes by
controlling the aging of switch MAC address table. generally, the aging time of MAC address in address table is 300
seconds. a ring network protection protocol can control MAC aging of the switch address table in a very short time.
both ring protection protocol and spanning tree protocol are used for link layer topology control. the spanning tree
protocol is suitable for various complex networks, which use the hop-by-hop method to propagate network
topology changes. The loop protection protocol is dedicated to the loop topology and propagates the topology
change information using diffusion method. Therefore, in the ring network, the convergence performance of the
ring network protection protocol is better than that of the spanning tree protocol. When the network is in good
condition, the time for the ring protection protocol to recover the network communication can be less than 50
milliseconds.
Description: The company's ring network protection protocol supports the configuration of a switch into nodes of
multiple physical ring networks to form tangent rings. ring protection protocols do not support intersecting rings
with common links.
1.2 ERPS Related Concepts
Figure 1: Example of ERPS Ethernet
1.2.1 Ring Network Level
ERPS support multi-loop or hierarchical transport network topology, as shown in Figure 1. The main ring is a complete single ring, and the
sub-loop is connected to the main loop (or sub-loop) through two interconnected nodes (interconnection-node), In Figure 1, The red line
is the main ring, node S1、link S1-S2、node S2、link S2-S4、node S4、link S4-S3、node S3、link S3-S1; The blue line is a subring,
node S3、link S3-S5、node S5、link S5-S6、node S6、link S6-S4、node but excluding link S4-S3.
1.2.2 Network Node Role
Each switch that forms the ring network is a ring network node. There are four kinds of ring network node roles: RPL protection node, RPL
neighbor node, interconnected node (interconnection-node) and common node (Node).one physical link is selected on each single loop
as the RPL protection link, one of the two switches directly connected to this link is used as the RPL protection node, the other is used as
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the RPL neighbor node, and the remaining other switches are used as ordinary nodes. and the interconnected node
(interconnection-node) is the two intersection nodes in which the sub-ring is connected to the main ring (or sub-ring).
the S1 is the RPL protection node in the main loop, as shown in figure 1, S3 is the RPL neighbor node, while the S2 and S4 are the ordinary
nodes; in the subloop, the S6 is the RPL protection node, and is connected to the main loop through the interconnected node
(interconnection-node).
the node type of the ERPS protocol is mainly determined by the port role, but the node type of the interconnected node
(interconnection-node) needs to be determined first when configured. by default, the node is not the interconnected node
(interconnection-node).
The function of the ring network node is basically the same: detect the state of the local ring network port and give notice when the link
fails. the difference is that RPL protect nodes and RPL neighbor nodes normally block RPL links, while ordinary nodes do not. the
interconnected node (interconnection-node) has only one ring-net port connected sub-rings, and the node must also be a node on
another main ring (or sub-ring).
1.2.3 Ring Network Port Role
ERPS protocol requires that each node has two ports connected to the ring network, and each port is called the ring network port (Ring
Port). furthermore, on each single loop, there exists a ring network port as the ring network protection link (RPL).For interconnected
nodes (interconnection-node), although there is only a loop network port connected subloop, there is also a virtual port to detect the
connectivity between the two interconnected nodes (interconnection-node), which will be discussed later.
normally, all ring network ports on the ring network except the RPL link are in the forwarding state, RPL the RPL ports of the protection
node and the RPL neighbor node are blocked to avoid the loop. RPL protect node and RPL neighbor node to unblock the RPL port in case
of ring network link failure to restore network communication.
At one switch, only one RPL port can be configured for each ring node instance.
Description: ERPS protocol supports configuring the aggregation port as a ring network port.
1.2.4 ERPS and CFM
the ring network link is monitored MEP, the ERPS port configuration. the ring network port monitors the state of its ring network link
through the down mep; the ring network port of the interconnected node accessing the sub-ring also has to configure the up mep to
monitor the connectivity on the main ring, as shown in figure 2.
Figure 2: Virtual ports of interconnected nodes configured on Up MEP ports
In figure 2, all ERPS ring network ports are configured down mep, monitor ring network links through down mep, e.g. ring network links
are configured on a ring network port C by nodes and nodes respectively down mep later monitored, the link fails or recovers from the
failure, sends corresponding notifications to the ERPS control module; at the same time, the down mep is responsible for receiving and
sending R-APS messages. up mep is only configured on the ring network port of the interconnected node to access the sub-ring to
monitor the connectivity of the main ring. when the direct main ring path of the interconnected node is impassable or the
communication is restored, the corresponding notification is sent to the ERPS control module. Moreover, the ring network port for an
interconnected node to access a sub-loop is not only configured up mep, because it is also a ring network port, it is also configured down
mep..
Description: An interconnected node connects to the ring network port of the sub-ring up mep is configured to monitor the
connectivity of the main ring, which is equivalent to the virtual port to monitor the main ring link.
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1.2.5 Connectivity Mode Using R-APS Virtual Channels
For a sub-loop, an interconnected node is a node that connects the sub-loop to the rest of the network, as shown in Figure 1. the up mep
port of the interconnected node monitors the connectivity of the main ring, which is called the R-APS virtual channel. by R-APS virtual
channels, two interconnected nodes can communicate R-APS through the rest of the network.
the sub-loop sends (and receives) R-APS information to the network via R-APS virtual channel, while R-APS information can be
transmitted in the network as a data stream. Of course, R-APS information is to be distinguished from ordinary data streams, so different
control vlan are used to carry R-APS information for different ERPS ring networks.
Of course, there is also a network state is the interconnection node in connection with the sub-ring and the rest of the network, do not
use the R-APS channel, its R-APS channel state is the forwarding state.
1.2.6 R-APS Transmission VLAN
R-APS message is transmitted in a R-APS channel, so set up a VLAN. specifically for the R-APS channel The different nodes set up different
VLAN, but for one node, the other nodes set up VLAN can be used as the VLAN. of common data stream transmission
When configuring a R-APS VLAN, if the VLAN is not created, the ERPS system automatically creates the VLAN. for it
the state of the ERPS loop network port in the R-APS channel is consistent with the state of the common data stream, except for the
sub-loop that does not use the R-APS virtual channel, because the R-APS channel of the interconnected node on this sub-loop is aborted,
so the node on the sub-loop of the R-APS virtual channel is not used, and the state of its R-APS channel is forwarding state.
Description: the VLAN of the MEP port where the ERPS port is located should be consistent with the R-APS transmission.
1.2.7 Return Mode
For some ring networks, the network resources of the link channel in which the data stream is normally transmitted will be better, while
the RPL channel is only used for backup, so the return mode is used to return the data stream back to the channel with better network
resources when switching and clearing. And some ring networks, the requirements for network resources are not so high, do not need to
reverse the recovery immediately back to the original link channel, so the use of non-return mode, but also reduce the number of return
switching.
During the return mode operation, when a switch is cleared, the data stream returns to the original channel, blocking the RPL.. The return
of the data stream in the case of clearing the fault needs to be used to avoid protection switching in the case of intermittent failure after
the WTR timer timeout; while the WTB timer needs to be waited in the case of clearing the manual or forced switching command.and in
non-return mode operation, when a switching is cleared, the data stream will still be on the RPL channel as long as the RPL channel is not
faulty.
Description: WTR timer and WTB timer only take effect in return mode.
1.3 ERPS Message Type
ERPS type of message used by the protocol is shown in Table 2.1.
ERPS Type of message for the protection protocol
Message Type Note
Forced Switch (FS) A loop network node (including a RPL node) notifies the other
node after a forced switching command.
Signal Fail (SF) a ring network node (including RPL nodes) notifies other nodes
after detecting local link failure.
Manual Switch (MS) A loop network node (including RPL nodes) notifies the other
nodes after manually switching the command.
No Request (NR) The ring network node notifies the other nodes after detecting all
local ring network link recovery.
No Request, RPL Blocked (NR-RB) The ring network protection node notifies the other node ring
network protection switching recovery.
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1.4 ERPS Ring Network Protection Mechanism
1.4.1 Stable State
the loop network protects the node from blocking the RPL port in a stable state and continuously sends NR-RB protocol messages in a
configurable period.
All common nodes that receive NR-RB messages set the local ring network port as forwarding state. In stable state, the common node
does not send the protocol message.
the period of the NR-RB message sent by the protection node can be modified by send-time node configuration command.
1.4.2 Local Link Failure Processing
Once a loop node detects a local link failure, it first de-blocking the local un-failed port (including RPL port or normal loop port that has
not yet entered the forwarding state), then starts sending SF protocol messages and aging the local MAC address table.
All other nodes that receive SF messages first stop sending local messages, then unblock local un-failure ports, and aging address tables.
The link failure node continuously sends the SF message in the configured send-time cycle. During this process, if the port of another
node recovers from the failure state, the node sets the recovery port to the forwarding state after receiving the SF message.
1.4.3 Local Link Recovery Processing
If the loop node detects that the local loop network port recovers from the failure state, it will maintain the blocking state of the port and
start sending NR messages continuously.
When a node receives a SF message from another node, which indicates that there are other invalid links in the network, the local node
stops sending NR message and sets the restored port to forwarding state.
when the local node does not receive a new SF message, after the ring network protection node (RPL node) receives the NR message, the
switching recovery timer is started. after the timer timeout, the RPL node re-blocking the RPL port, sending the NR-RB message, and then
the address table aging, the network communication is restored to original stable state.
1.4.4 Protection of Switching —— Link Recovery
If the loop node detects that the local loop network port recovers from the failure state, it will maintain the blocking state of the port and
start sending NR messages continuously.
When a node receives a SF message from another node, which indicates that there are other invalid links in the network, the local node
stops sending NR message and sets the restored port to forwarding state.
When the local node does not receive the new SF message, the link recovery is carried out after the network protection node (RPL node)
receives the NR message.but the behavior and function of return mode and non-return mode are inconsistent when link recovery.
1.4.4.1 Return Mode
In return mode, the ring link is restored.RPL node receives the NR message, it will start the switching recovery timer. after the timer
timeout, the RPL node re-blocking the RPL port, sending the NR-RB message, and then the address table aging, network communication
back to the initial stable state.
1.4.4.2 Non-return Mode
In non-return mode, the ring link does not automatically recover. RPL node does not reply after receiving the NR message, and the other
nodes do not do any action after receiving the NR message. Only when RPL node receives the Clear command will the RPL node block the
link and continuously send NR RB messages to the two ring network ports, then Flush FDB.Failure node receives NR RB message to
unblock the port.Network nodes perform FDB Flush. after receiving NR RB message
1.4.5 Protection Switching —— Manual Switching
When a loop network node receives a manual switching command, it blocks the data channel and the R-APS channel (blocking the port
of one data channel and R-APS channel), opens the other loop network ports, and continuously sends MS messages to the two loop
network ports, then Flush FDB.. The remaining ring network nodes receive MS messages and open the data flow and R-APS channels
through the RPL. The ring network node that sends MS message stops sending MS message after receiving the message.Network nodes
perform FDB Flush. after receiving MS message
The above actions completed a manual switching operation, in order to switch normal, there are several points to note:
（1）When a manual switching command already exists in the ring network, the subsequent manual switching commands are
invalid. The node receiving the new switching command rejects the new switching command and notifies that manual switching is
rejected.
（2）Local nodes that have generated manual switching commands should clear local manual switching commands and send NR
messages if MS messages ID different nodes are received. At the same time, the node keeps blocking the ring network port blocked by
the previous manual switching command.
（3）A node that has generated a manual switching command should clear the manual switching request and execute a higher
priority request if a higher priority local request or message is received.
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A node that performs a manual switching command clears the manual switching command after receiving the Clear command. A node
keeps blocking the ring network port blocked by the previous manual switching command and continuously sends NR messages to both
ring network ports. and the following link recovery, the behavior and function of return mode and non-return mode are inconsistent.
1.4.5.1 Return Mode
In return mode, the ring link is restored. RPL node receives the NR message and starts the WTB timer. WTB the timer timeout, the RPL
node blocks the link, sends NR RB messages, and Flush FDB. them The rest of the ring network nodes unblock all non RPL links after
receiving the NR RB message, and then Flush FDB.
1.4.5.2 Non-return Mode
In non-return mode, the ring link does not automatically recover. RPL node does not reply after receiving the NR message, and the other
nodes do not do any action after receiving the NR message. Only when RPL node receives the Clear command will the RPL node block the
link and continuously send NR RB messages to the two ring network ports, then Flush FDB.The rest of the ring network nodes unblock all
non RPL links after receiving the NR RB message, and then Flush FDB.
1.4.6 Protection Switching —— Forced Switching
When a loop network node receives a forced switching command, it blocks the data channel and R-APS channel (blocking the port of one
data channel and R-APS channel), opens the other loop network ports, and continuously sends FS messages to the two loop network
ports, then Flush FDB.. The remaining ring network nodes receive FS messages and open the data flow and R-APS channels through the
RPL. The ring network node that sends FS message stops sending FS message after receiving the message. Network nodes perform FDB
Flush. after receiving FS message
The above actions completed a forced switching operation, in order to normal switching, there is a point to note:
When a forced switching command already exists in the ring network, subsequent forced switching requests are accepted unless the
node has previously accepted a forced switching request. At the same time, the node receiving the new switching command to
re-enforce switching operation, blocking ports, sending FS messages and so on. Of course, the execution of multiple forced switching
commands will split the ring network, so it should be properly avoided.
A node that performs a mandatory switching command clears the mandatory switching command after receiving the Clear command. A
node keeps blocking the ring network port blocked by the previous forced switching command and continuously sends NR messages to
both ring network ports. and the following link recovery, the behavior and function of return mode and non-return mode are
inconsistent.
1.4.6.1 Return Mode
In return mode, the ring link is restored. RPL node receives the NR message and starts the WTB timer. WTB the timer timeout, the RPL
node blocks the link, sends NR RB messages, and Flush FDB. them The rest of the ring network nodes unblock all non RPL links after
receiving the NR RB message, and then Flush FDB.
1.4.6.2 Non-return Mode
In non-return mode, the ring link does not automatically recover. RPL node does not reply after receiving the NR message, and the other
nodes do not do any action after receiving the NR message. Only when RPL node receives the Clear command will the RPL node block the
link and continuously send NR RB messages to the two ring network ports, then Flush FDB.The rest of the ring network nodes unblock all
non RPL links after receiving the NR RB message, and then Flush FDB.
1.4.7 Replacement Recovery Process
The ring network protection node (RPL Owner) realizes the ring network switching recovery through timer WTR (wait-to-restore timer)
and timer WTB (wait-to-block timer).WTR timer and WTB timer are used to avoid frequent protection switching on the ring network.
WTR timer only takes effect in return mode, in non-return mode, when the ring network is recovered from the protection state, the ring
network recovery is not carried out, so there is no need to turn on the WTR timer. while in return mode, after RPL node receives NR
messages from other nodes, the WTR timer is started. before the timer time-out, the RPL node maintains the forwarding state of the port
and does not send a ring network recovery notification. When RPL node receives SF message again, it indicates that the ring network has
not been fully restored, and the node stops WTR timer.WTR the RPL node re-blocking the port after the timer timeout.
WTB timer only works in return mode, used when clearing forced and manual switching commands. When you clear multiple forced
switching commands, the WTB timer ensures that a single forced switching command does not cause RPL to duplicate blocking. When a
manual switching command is cleared, the WTB timer prevents the RPL node from receiving a closed loop caused by an outdated remote
MS request during recovery.
The WTB timer must ensure that there is enough time to receive remote FS、SF and MS messages, so defining the WTB timer is 5 seconds
longer than the Guard timer, which is enough for a reporting ring node to send two R-APS messages and allow the entire ring network to
confirm situation.
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Chapter 2 ERPS Configuration
2.1 ERPS Configuration Notes
Before configuring the ERPS ring protection protocol, read the following notes:
· ERPS port must be hosted on the CFM MEP port, to configure the information for the ERPS port to match the MEP port, the port can be
enabled normally after success.
· The default VLAN (or control vlan) for all ring ports needs to be configured to ensure that ERPS messages are forwarded properly.
· The default VLAN and control VLAN of ERPS ring network ports can not be the same as EAPS control VLAN using both protocols.
non-reforwardable protocol message in ERPS EAPS control VLAN.
· One port can not act as a ring network port for both ERPS and EAPS protocols.
· ERPS protocol supports configuring physical or aggregate ports as ring network ports. physical ports that have been configured for link
aggregation ,802.1 X authentication, or port security are not configurable as ERPS ring network ports.
2.2 ERPS Configuration Tasks
·Configuration of ring network nodes
·Configure loop ports
·View Ring Protection Protocol Status
2.2.1 Configuration of Ring Network Nodes
In global configuration mode, follow the steps below to configure the switch to ERPS nodes.
Command Objective
Switch_config#erps id
configure the ERPS ring network node instance and enter the node
configuration mode.
id：ring network example number, range 0-7.
Switch_config_ring#control-vlan
value
Must choose.Configure control VLAN. for local nodes no control vlan,
remove control VLAN. of local nodes the node must not be changed after
normal operation.
value：range 1-4094. Default no control-vlan.
Switch_config_ring#interconnecti
on-node
Must choose.configure the local node as an interconnected node. no
interconnection-node, configure the local node is not an interconnected
node. the node must not be changed after normal operation.
default is local node not interconnected node.
Switch_config_ring#raps
-virtual-channel
Must choose.Configure local nodes to use R-APS virtual channels. no raps
-virtual-channel, configure the local node does not use R-APS virtual
channels. the node must not be changed after normal operation.
Default uses R-APS virtual channels for local nodes.
Switch_config_ring#revertive-mo
de
Must choose.configure the return mode of the local node as return mode.
no revertive-mode, configure the return mode of the local node as
non-return mode. the node must not be changed after normal operation.
Default is local node for return mode.
Switch_config_ring#version value
Configure version. of local nodes
value：default 1, range 0-2.
Switch_config_ring#wtr-time
value
configure the switching recovery timer WTR timeout.
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value：timer timeout, default 20 seconds, range 10-720 seconds.
Switch_config_ring#guard-time
value
configure Guard timer timeout time.
As a port recovers from the failure state, the Guard timer for a short period
of time forbids processing the received protocol message to avoid the
wrong protocol action due to receiving the expired message.
value：unit 10 ms, default 50, range 1-200.
Switch_config_ring#send-time
value
configure protocol message sending cycle.
value：message sending cycle, default 5 seconds, range 1-10.
Switch_config_ring#exit Exit node configuration mode and start node.
Description:
1. Delete the ring network node configuration and the node port configuration using the no erps id command.
2. interconnection-node 、raps -virtual-channel 、revertive-mode these three commands are mandatory, they all have default
configurations, so when you create a local node, you can omit these commands if you don't need to modify their default values.
2.2.2 Configure Loop Ports
Follow the steps below to configure the switch port as a ring network port.
Command Objective
Switch_config#interface int er f ace-type
interface -number
into port configuration mode.
intf -name：port name.
Switch_config_intf#erps id ring-port
Configure the port as a normal ring network port for the specified
node.
id：ring mesh example number.
Switch_config_intf#erps id rpl
Configure the port as the ring network protection link for the
specified node. In the case of automatic discovery of enable, the
function of this command is equivalent to modifying the priority value
to 0.
id：ring mesh example number.
Switch_config_intf#erps id neighbour
the port is configured as the RPL neighbor port of the specified node,
and the port must be connected to the RPL port and must be
configured as the RPL neighbor port.
id：ring mesh example number.
Switch_config_intf#erps id mep [up
|down]md md-WORD ma ma-WORD
level level-id local local-id remote
remote-id
bind ERPS port to MEP port.
id：ring mesh example number.
md-WORD：MEP maintenance domain information.
ma-WORD：MEP maintenance link information.
level-id：MEP rating information.
local-id：MEP local id information.
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remote-id：MEP distal id information.
Switch_config_intf#exit exit port configuration mode.
Description:
1. Modify the RPL port to a normal ring network port by no erps id rpl port configuration command.
2. remove the normal ring network port (RPL neighbour port) or RPL port configuration via the no erps id ring-port port configuration
command.
3. the erps id ring-port (neighbour) and rpl commands will create a ring network node at the same time when the ring network node is
not globally configured.
4. up mep can only be configured in interconnection-node nodes, and interconnection-node can only configure 1 ring network port.
2.2.3 Ring Network Control Command
In monitoring mode, use the following command to control the ring network status.
Command Objective
erps id ForcedSwitch interface int er f ace-type
interface -number
Forced switching of nodes to port int er f ace-type interface
-number.
id：ring mesh example number.
erps id M anualSwitch interface int er f
ace-type interface -number
Change nodes manually to port int er f ace-type interface
-number.
id：ring mesh example number.
erps id Clear
clears the switching command of the node.
id：ring mesh example number.
2.2.4 View Ring Protection Protocol Status
Use the command below to view the ring protection protocol status.
Command Objective
show erps id
view the summary information of the ring network
protection protocol and the ring network port.
id：ring mesh example number.
show erps id detail view the ring network protection protocol and port details.
show erps interface int er f ace-type
interface -number view the status information of the ring network port.
2.3 ERPS Configuration Examples
2.3.1 Configuration Example 1- ERPS Single Ring Configuration
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Figure 5.1 ERPS Single Ring Configuration
As shown in Figure 5.1, the S1、S2、S3、S4 configuration is as follows:
2.3.1.1 Configuration switch S1：
Configuration CFM functions:
Switch#config
Switch_config#ethernet cfm ENABLE
Switch_config#ethernet cfm md mdnf STRING a level 4
Switch_config_cfm#ma manf STRING a meps 1-2vlan 2
Switch_config_cfm#exit
Switch_config#ethernet cfm md mdnf STRING d level 4
Switch_config_cfm#ma manf STRING d meps 1,4vlan 2
Switch_config_cfm#exit
Switch_config#interface f0/1
Switch_config_f0/1#ethernet cfm ENABLE
Switch_config_f0/1#ethernet cfm mep add mdnf STRING a manf STRING a mepid 1rmepid 2
Switch_config_f0/1#interface f 0/4
Switch_config_f0/4#ethernet cfm ENABLE
Switch_config_f0/4#ethernet cfm mep add mdnf STRING d manf STRING d mepid 1rmepid 4
Network node configuration:
Switch_config#erps 1
Switch_config_ring1#control-vlan 2
Switch_config_ring1#exit
Switch_config#
Configure common ports:
Switch_config#int erface f0/1
Switch_config_f0/1#erps 1ring-port
Switch_config_f0/1#erps 1cfm-disable
Switch_config_f0/1#erps 1mep down md a ma a level 4local 1remote 2
Configure RPL ports:
Switch_config#int erface f0/4
Switch_config_f0/4#erps 1rpl
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S3400-48T4SP SWITCH ERPS CONFIGURATION GUIDE
Switch_config_f0/4#erps 1cfm-disable
Switch_config_f0/4#erps 1mep down md d ma d level 4local 1remote 4
2.3.1.2 Configuration switch S2：
Configuration CFM functions:
Switch#config
Switch_config#ethernet cfm ENABLE
Switch_config#ethernet cfm md mdnf STRING a level 4
Switch_config_cfm#ma manf STRING a meps 1-2vlan 2
Switch_config_cfm#exit
Switch_config#ethernet cfm md mdnf STRING b level 4
Switch_config_cfm#ma manf STRING b meps 2-3vlan 2
Switch_config_cfm#exit
Switch_config#interface f 0/1
Switch_config_f0/1#ethernet cfm ENABLE
Switch_config_f0/1#ethernet cfm mep add mdnf STRING a manf STRING a mepid 2rmepid 1
Switch_config_f0/1#interface f 0/2
Switch_config_f0/2#ethernet cfm ENABLE
Switch_config_f0/2#ethernet cfm mep add mdnf STRING b manf STRING b mepid 2rmepid 3
Network node configuration:
Switch_config#erps 1
Switch_config_ring1#control-vlan 2
Switch_config_ring1#exit
Switch_config#
Configure common ports:
Switch_config#int erface f0/1
Switch_config_f0/1#erps 1ring-port
Switch_config_f0/1#erps 1cfm-disable
Switch_config_f0/1#erps 1mep down md a ma a level 4local 2remote 1
Switch_config_f0/1#int erface f0/2
Switch_config_f0/2#erps 1ring-port
Switch_config_f0/2#erps 1cfm-disable
Switch_config_f0/2#erps 1mep down md b ma b level 4local 2remote 3
2.3.1.3 Configuration switch S3：
Configuration CFM functions:
Switch#config
Switch_config#ethernet cfm ENABLE
Switch_config#ethernet cfm md mdnf STRING b level 4
Switch_config_cfm#ma manf STRING b meps 2-3vlan 2
Switch_config_cfm#exit
Switch_config#ethernet cfm md mdnf STRING c level 4
Switch_config_cfm#ma manf STRING c meps 3-4vlan 2
Switch_config_cfm#exit
Switch_config#interface f0/2
Switch_config_f0/2#ethernet cfm ENABLE
Switch_config_f0/2#ethernet cfm mep add mdnf STRING b manf STRING b mepid 3rmepid 2
Switch_config_f0/2#interface f0/3
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S3400-48T4SP SWITCH ERPS CONFIGURATION GUIDE
Switch_config_f0/3#ethernet cfm ENABLE
Switch_config_f0/3#ethernet cfm mep add mdnf STRING c manf STRING c mepid 3rmepid 4
Network node configuration:
Switch_config#erps 1
Switch_config_ring1#control-vlan 2
Switch_config_ring1#exit
Switch_config#
Configure common ports:
Switch_config#int erface f0/2
Switch_config_f0/2#erps 1ring-port
Switch_config_f0/2#erps 1cfm-disable
Switch_config_f0/2#erps 1mep down md b ma b level 4local 3remote 2
Switch_config_f0/2#int erface f0/3
Switch_config_f0/3#erps 1ring-port
Switch_config_f0/3#erps 1cfm-disable
Switch_config_f0/3#erps 1mep down md c ma c level 4local 3remote 4
2.3.1.4 Configuration switch S 4：
Configuration CFM functions:
Switch#config
Switch_config#ethernet cfm ENABLE
witch_config#ethernet cfm md mdnf STRING c level 4
Switch_config_cfm#ma manf STRING c meps 3-4vlan 2
Switch_config_cfm#exit
Switch_config#ethernet cfm md mdnf STRING d level 4
Switch_config_cfm#ma manf STRING d meps 1,4vlan 2
Switch_config_cfm#exit
Switch_config#interface f0/3
Switch_config_f0/3#ethernet cfm ENABLE
Switch_config_f0/3#ethernet cfm mep add mdnf STRING c manf STRING c mepid 4rmepid 3
Switch_config_f0/3#interface f0/4
Switch_config_f0/4#ethernet cfm ENABLE
Switch_config_f0/4#ethernet cfm mep add mdnf STRING d manf STRING d mepid 4rmepid 1
Network node configuration:
Switch_config#erps 1
Switch_config_ring1#control-vlan 2
Switch_config_ring1#exit
Switch_config#
Configure common ports:
Switch_config#int erface f0/3
Switch_config_f0/3#erps 1ring-port
Switch_config_f0/3#erps 1cfm-disable
Switch_config_f0/3#erps 1mep down md c ma c level 4local 4remote 3
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S3400-48T4SP SWITCH ERPS CONFIGURATION GUIDE
Configure RPL neighbor ports:
Switch_config#int erface f0/4
Switch_config_f0/4#erps 1neighbour
Switch_config_f0/4#erps 1cfm-disable
Switch_config_f0/4#erps 1mep down md d ma d level 4local 4remote 1
2.3.2 Configuration Example 2- ERPS Multi-ring Configuration
Figure 5.2 ERPS Multi-ring configuration
The interconnection node S 3 and S 4 configurations are as follows, as shown in Figure 5.2, and the other nodes are slightly configured.
2.3.2.1 Configuration switch S 3：
Configuration CFM functions:
Switch#config
Switch_config#ethernet cfm ENABLE
Switch_config#ethernet cfm md mdnf STRING mdn b level 4
Switch_config_cfm#ma manf STRING man b meps 2-3vlan 2
Switch_config_cfm#exit
Switch_config#ethernet cfm md mdnf STRING mdn c level 4
Switch_config_cfm#ma manf STRING man c meps 3-4vlan 2
Switch_config_cfm#exit
Switch_config#ethernet cfm md mdnf STRING mdn g level 4
Switch_config_cfm#ma manf STRING man g meps 3,6vlan 3
Switch_config_cfm#exit
Switch_config#ethernet cfm md mdnf STRING mdn u level 5
Switch_config_cfm#ma manf STRING man u meps 3-4vlan 3
Switch_config_cfm#exit
Switch_config#interface f0/2
Switch_config_f0/2#ethernet cfm ENABLE
Switch_config_f0/2#ethernet cfm mep add mdnf STRING mdn b manf STRING man b mepid 3
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S3400-48T4SP SWITCH ERPS CONFIGURATION GUIDE
S3400-48T4SP SWITCH ERPS CONFIGURATION GUIDE
Switch_config_f0/2#ethernet cfm mep ENABLE mdnf STRING mdn b manf STRING man b mepid 3
Switch_config_f0/2#ethernet cfm mep cci-ENABLE mdnf STRING mdn b manf STRING man b mepid 3
Switch_config_f0/2#interface f0/3
Switch_config_f0/3#ethernet cfm ENABLE
Switch_config_f0/3#ethernet cfm mep add mdnf STRING mdn c manf STRING man c mepid 3
Switch_config_f0/3#ethernet cfm mep ENABLE mdnf STRING mdn c manf STRING man c mepid 3
Switch_config_f0/3#ethernet cfm mep cci-ENABLE mdnf STRING mdn c manf STRING man c mepid 3
Switch_config_f0/3#interface f0/7
Switch_config_f0/7#ethernet cfm ENABLE
Switch_config_f0/7#ethernet cfm mep add mdnf STRING mdn g manf STRING man g mepid 3
Switch_config_f0/7#ethernet cfm mep ENABLE mdnf STRING mdn g manf STRING man g mepid 3
Switch_config_f0/7#ethernet cfm mep cci-ENABLE mdnf STRING mdn g manf STRING man g mepid 3
Switch_config_f0/7#ethernet cfm mep add mdnf STRING mdn u manf STRING man u mepid 3direction up
Switch_config_f0/7#ethernet cfm mep ENABLE mdnf STRING mdn u manf STRING man u mepid 3
Switch_config_f0/7#ethernet cfm mep cci-ENABLE mdnf STRING mdn u manf STRING man u mepid 3
Network node configuration:
Switch_config#erps 1
Switch_config_ring1#control-vlan 2
Switch_config_ring1#exit
Switch_config#
Switch_config#erps 2
Switch_config_ring1#control-vlan 3
Switch_config_ring1#interconnection-node
Switch_config_ring1#exit
Switch_config#
Configure ERPS1 common ports:
Switch_config#int erface f0/2
Switch_config_f0/2#erps 1ring-port
Switch_config_f0/2#erps 1mep down md b ma b level 4local 3remote 2
Switch_config_f0/2#int erface f0/3
Switch_config_f0/3#erps 1ring-port
Switch_config_f0/3#erps 1mep down md c ma c level 4local 3remote 4
Configure ERPS2 common ports:
Switch_config_f0/3#int erface f0/7
Switch_config_f0/7#erps 2ring-port
Switch_config_f0/7#erps 2mep down md g ma g level 4local 3remote 6
Switch_config_f0/7#erps 2mep down md u ma u level 5local 3remote 4
2.3.2.2 Configuration switch S 4：
Configuration CFM functions:
Switch#config
Switch_config#ethernet cfm ENABLE
Switch_config#ethernet cfm md mdnf STRING mdn c level 4
Switch_config_cfm#ma manf STRING man c meps 3-4vlan 2
Switch_config_cfm#exit
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S3400-48T4SP SWITCH ERPS CONFIGURATION GUIDE
Switch_config#ethernet cfm md mdnf STRING mdn d level 4
Switch_config_cfm#ma manf STRING man d meps 1,4vlan 2
Switch_config_cfm#exit
Switch_config#ethernet cfm md mdnf STRING mdn e level 4
Switch_config_cfm#ma manf STRING man e meps 4-5vlan 3
Switch_config_cfm#exit
Switch_config#ethernet cfm md mdnf STRING mdn u level 5
Switch_config_cfm#ma manf STRING man u meps 3-4vlan 3
Switch_config_cfm#exit
Switch_config#interface f0/3
Switch_config_f0/3#ethernet cfm ENABLE
Switch_config_f0/3#ethernet cfm mep add mdnf STRING mdn c manf STRING man c mepid 4
Switch_config_f0/3#ethernet cfm mep ENABLE mdnf STRING mdn c manf STRING man c mepid 4
Switch_config_f0/3#ethernet cfm mep cci-ENABLE mdnf STRING mdn c manf STRING man c mepid 4
Switch_config_f0/3#interface f0/4
Switch_config_f0/4#ethernet cfm ENABLE
Switch_config_f0/4#ethernet cfm mep add mdnf STRING mdn d manf STRING man d mepid 4
Switch_config_f0/4#ethernet cfm mep ENABLE mdnf STRING mdn d manf STRING man d mepid 4
Switch_config_f0/4#ethernet cfm mep cci-ENABLE mdnf STRING mdn d manf STRING man d mepid 4
Switch_config_f0/4#interface f0/5
Switch_config_f0/5#ethernet cfm ENABLE
Switch_config_f0/5#ethernet cfm mep add mdnf STRING mdn e manf STRING man e mepid 4
Switch_config_f0/5#ethernet cfm mep ENABLE mdnf STRING mdn e manf STRING man e mepid 4
Switch_config_f0/5#ethernet cfm mep cci-ENABLE mdnf STRING mdn e manf STRING man e mepid 4
Switch_config_f0/5#ethernet cfm mep add mdnf STRING mdn u manf STRING man u mepid 4direction up
Switch_config_f0/5#ethernet cfm mep ENABLE mdnf STRING mdn u manf STRING man u mepid 4
Switch_config_f0/5#ethernet cfm mep cci-ENABLE mdnf STRING mdn u manf STRING man u mepid 4
Network node configuration:
Switch_config#erps 1
Switch_config_ring1#control-vlan 2
Switch_config_ring1#exit
Switch_config#
Switch_config#erps 2
Switch_config_ring1#control-vlan 3
Switch_config_ring1#interconnection-node
Switch_config_ring1#exit
Switch_config#
Configure ERPS1 common ports:
Switch_config#int erface f0/3
Switch_config_f0/3#erps 1ring-port
Switch_config_f0/3#erps 1mep down md c ma c level 4local 4remote 3
Configure ERPS1 RPL neighbor ports:
Switch_config#int erface f0/4
Switch_config_f0/4#erps 1neighbour
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S3400-48T4SP SWITCH ERPS CONFIGURATION GUIDE
Switch_config_f0/4#erps 1mep down md d ma d level 4local 4remote 1
Configure ERPS2 common ports:
Switch_config#int erface f0/5
Switch_config_f0/5#erps 2ring-port
Switch_config_f0/5#erps 2mep down md e ma e level 4local 4remote 5
Switch_config_f0/5#erps 2mep down md u ma u level 5local 4remote 3
erps：showing switch S3
Switch_config#show erps
Ethernet Ring Protection Switching
Ring1
RPL Owner Priority Unknown
Address
This node is the RPL Owner
Node ID Priority 32770(priority 32770 id 1)
Address 00E0.0F81.111B
Control Vlan 2
Version 1
RAPS Virtual Channel：True
Revertive Mode：Revertive
State Pending WTR False
Signal Fail False Sending NR
WTR time 0/20sec WTB time 0/6sec
Guard time 0/500ms Send time 1/5sec
Interface Role State Status MEP Role
---------------------------------------------------------------------
F0/2Ring-Port BLK Link-down DOWN-MEP
F0/3Ring-Port FWD Link-down DOWN-MEP
Ring2
RPL Owner Priority Unknown
Address
Node ID Priority 32770(priority 32768 id 2)
Address 00E0.0F81.111B
Control Vlan 3
Version 1
This node is the interconnection node
RAPS Virtual Channel：True
Revertive Mode：Revertive
State Protection
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S3400-48T4SP SWITCH ERPS CONFIGURATION GUIDE
Signal Fail False Sending SF
WTR time 0/20sec WTB time 0/6sec
Guard time 0/500ms Send time 1/5sec
Interface Role State Status MEP Role
---------------------------------------------------------------------
F0/7Ring-Port FWD Link-up DOWN-MEP
F0/7(up) Ring-Port BLK Link-down UP-MEP
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